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Service bulletins for the 2021 BMW Z4

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

115 on file from NHTSA, as of 2026-10-19.

By type

By component

Only bulletins with component: Fuel system are shown. Show all

Bulletins, newest first
B1601232024-02-01. Service bulletin. FUEL SYSTEM, GASOLINE. A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP) system(NVLD natural vacuum leak detection). For this condition, the following fault is stored in the DME: 190302 - fuel tank ventilation and scavenging air system, micro-leak: leakage more than 0.5mm For: Model vehicles other that the ones listed above, or for EVAP faults related to a “large leak,” after confirming that the fuel filler cap is fitted properly, then, proceed to follow the corresponding test plan
B1601232023-07-24. Service bulletin. FUEL SYSTEM, GASOLINE. A vehicle arrives at your center to be diagnosed for a micro-leak in the fuel evaporative (EVAP) system (NVLD natural vacuum leak detection). For this condition, the following fault is stored in the DME: 190302 - fuel tank ventilation and scavenging air system, micro-leak: leakage more than 0.5 mm.
B1603202020-11-23. Service bulletin. FUEL SYSTEM, GASOLINE. DELIVERY STOP - REPLACE FUEL TANK: Over time, a fuel tank weld seam may start to separate at locations in which welding may have beeninsufficient.
B1603202020-11-16. Service bulletin. EQUIPMENT; FUEL SYSTEM, GASOLINE. DELIVERY STOP - REPLACE FUEL TANK: Over time, a fuel tank weld seam may start to separate at locations in which welding may have beeninsufficient.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.